Hi Krzysztof,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   9f29bd8b2e7132b409178d1367dae1813017bd0e
commit: 91687c1926bcd6b80d669375d57331b7bf80bf99 usb: phy: Enable compile testing for some of drivers
date:   1 year, 1 month ago
config: mips-randconfig-r001-20210122 (attached as .config)
compiler: mipsel-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=91687c1926bcd6b80d669375d57331b7bf80bf99
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 91687c1926bcd6b80d669375d57331b7bf80bf99
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   mipsel-linux-ld: drivers/gpu/drm/imx/imx-ldb.o: in function `imx_ldb_encoder_enable':
   imx-ldb.c:(.text+0x2ac): undefined reference to `clk_set_parent'
   mipsel-linux-ld: imx-ldb.c:(.text+0x2b8): undefined reference to `clk_set_parent'
   mipsel-linux-ld: imx-ldb.c:(.text+0x3f0): undefined reference to `clk_set_parent'
   mipsel-linux-ld: drivers/gpu/drm/imx/imx-ldb.o: in function `imx_ldb_encoder_disable':
   imx-ldb.c:(.text+0x5b4): undefined reference to `clk_set_parent'
   mipsel-linux-ld: drivers/gpu/drm/imx/imx-ldb.o: in function `imx_ldb_set_clock':
   imx-ldb.c:(.text+0x708): undefined reference to `clk_set_parent'
   mipsel-linux-ld: drivers/gpu/drm/imx/imx-ldb.o: in function `imx_ldb_bind':
   imx-ldb.c:(.text+0xa28): undefined reference to `clk_get_parent'
   mipsel-linux-ld: drivers/gpu/drm/ingenic/ingenic-drm.o: in function `ingenic_drm_probe':
   ingenic-drm.c:(.text+0xbcc): undefined reference to `clk_get_parent'
   mipsel-linux-ld: drivers/usb/phy/phy-tegra-usb.o: in function `tegra_usb_phy_probe':
>> phy-tegra-usb.c:(.text+0x4d4): undefined reference to `clk_get_parent'
   mipsel-linux-ld: drivers/iio/adc/ingenic-adc.o: in function `jz4770_adc_init_clk_div':
   ingenic-adc.c:(.text+0x20): undefined reference to `clk_get_parent'
   mipsel-linux-ld: drivers/iio/adc/ingenic-adc.o: in function `jz4725b_adc_init_clk_div':
   ingenic-adc.c:(.text+0x13c): undefined reference to `clk_get_parent'
   mipsel-linux-ld: sound/soc/jz4740/jz4740-i2s.o: in function `jz4740_i2s_set_sysclk':
   jz4740-i2s.c:(.text+0x1c0): undefined reference to `clk_set_parent'
   mipsel-linux-ld: jz4740-i2s.c:(.text+0x234): undefined reference to `clk_set_parent'

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org